The U.S. Court of Appeals for the Tenth Circuit issued a decision on August 3, 2026, which clarified the scope of the diligent prosecution bar to citizen suits under the Clean Air Act (“CAA”).  The decision was a partial victory for the environmental organizations that brought the lawsuit and adds to the body of appellate decisions aiming to elucidate this heavily litigated area of the law. Read More »

Share | Email| Comments|  Topics: Air, CERCLA, Citizen Suit, Citizens Suit, Clean Air Act, Colorado, Consent Decree, Diligent Prosecution, Emissions, EPA, Loper Bright, Pollutants, Superfund, Tenth Circuit

In West Virginia Rivers Coalition, Inc., et al. v. The Chemours Company FC, LLC, the Court of Appeals for the Fourth Circuit vacated a district court decision to preliminarily enjoin The Chemours Company (“Chemours”) from discharging hexafluoropropylene oxide dimer acid (“HFPO-DA”)—a Chemours-created PFAS chemical— from its Washington Works facility in excess of its permitted limit.  In doing so, the Fourth Circuit took no issue with the district court’s standing analysis, but determined the district court made legal and factual errors in its irreparable harm determination. Read More »

Share | Email| Comments|  Topics: Citizens Suit, Clean Water Act, Contamination, Drinking Water, Fourth Circuit, Injunction, Permits, PFAS, Pollutants, Standing, Water

The Ninth Circuit’s November 5^th decision in Coastal Environmental Rights Foundation, v. Naples Restaurant Group, LLC exploded onto the scene -- deepening an existing circuit split on whether a Clean Water Act citizen suit stays alive based solely only civil penalties once the alleged wrongful conduct ceases.  Consistent with the Eighth Circuit, the Ninth Circuit answered this question in the negative in Naples Restaurant.  The Second, Third, Fourth, Seventh and Eleventh Circuits have previously answered the question in the affirmative.  Overall, the key takeaway is for parties to make sure they are cognizant of the prevailing rule in their Circuit, and to be prepared to raise or respond to the arguments implicated by the Naples Restaurant opinion. Read More »

Share | Email| Comments|  Topics: Citizen Suit, Citizens Suit, Civil Penalties, Clean Water Act, Enforcement, Ninth Circuit, NPDES, Permits, Pollutants, Water

This month, the United States Court of Appeals for the Ninth Circuit held in Confederated Tribes of the Colville Rsrv. v. Teck Cominco Metals Ltd, No. 24-5565, 2025 WL 2525853 (9th Cir. Sept. 3, 2025) that CERCLA permits recovery of natural resource damages with a cultural use component, effectively reversing the district court’s holding that cultural resource damages are not authorized under CERCLA. Read More »

Share | Email| Comments|  Topics: CERCLA, Citizen Suit, Citizens Suit, Contamination, Natural Resource Damages, Ninth Circuit, Pollutants, Tribal Lands, Water, Water Use

On June 30, 2025, the Supreme Court denied the Port of Tacoma (the “Port”) and SSA Terminals LLC's (“SSA”) petition for writ of certiorari to review the 9^th Circuit’s decision in Port of Tacoma v. Puget Soundkeeper Alliance addressing whether the Clean Water Act (“CWA”) authorizes citizens to enforce conditions of state-issued pollutant discharge permits adopted under state law that impose a greater scope of coverage than required by the CWA.  The 9th Circuit answered this question in the affirmative, holding that Washington's Industrial Stormwater General Permits (“ISGP”), a CWA National Pollutant Discharge Elimination System (“NPDES”) permit, required the Port and SSA to have the necessary stormwater controls across the entire West Sitcum Terminal (the “Terminal”).  The Supreme Court's recent decision to deny certiorari leaves litigants open to a patchwork of Circuit determinations on the scope of the CWA’s citizen suit provision.  Read More »

Share | Email| Comments|  Topics: Citizen Suit, Citizens Suit, Clean Water Act, Ninth Circuit, NPDES, Permits, Private Right of Action, Stormwater, Supreme Court, United States Supreme Court, Water

In a January 17, 2025 opinion in the cases of Montana Wildlife Federation et al. v. Deb Haaland et al. and Western Watersheds Project et al. v. Deb Haaland et al., the United States Court of Appeals for the Ninth Circuit examined a number of oil and gas leases in Idaho and Montana sold during the prior Trump administration, vacating some and overturning vacatur of others. The opinion offers insight into how a court may look to analyze improper agency action in instances where significant economic expenditure has already taken place. Read More »

Share | Email| Comments|  Topics: Agency Action, Citizens Suit, Exploration, Federal Land Policy and Management Act, Leases, Mineral Rights, NEPA, Ninth Circuit, Oil and Gas, Public Lands

In a recent case from the United States District Court for the Northern District of Illinois, two plaintiffs alleged that Danone Waters of America, LLC (“Danone”) violated Illinois and California state statutes by labeling Evian spring water “natural” despite the presence of microplastics which leach from the plastic bottles into the water.  Daly v. Danone Waters of America, LLC, 2024 WL 4679086 (N.D. Ill. Nov. 5, 2024).  Read More »

Share | Email| Comments|  Topics: California, Citizens Suit, Greenwashing, Illinois, Preemption

In an opinion published on December 18, 2024, the Montana Supreme Court found that a provision in the Montana Constitution providing for the right to a “clean and healthful environment” guarantees the right to a stable climate system.  In Held v. State of Montana, 2024 MT 312 (Mont. 2024), the Montana Supreme Court affirmed a trial court decision striking down state law provisions that barred state agencies from considering greenhouse gas (“GHG”) emissions in permitting decisions, finding the law violates the environmental rights guaranteed by the Montana Constitution. Read More »

Share | Email| Comments|  Topics: Air, Citizens Suit, Clean Air Act, Climate Change, Greenhouse Gas, Montana

In Kanawha Forest Coalition, et al. v. Keystone WV, 2:22-cv-00367, 2023 WL 6466210 (S.D. W.V. Oct. 4, 2023), the Honorable Joseph R. Goodwin of the United States District Court for the Southern District of West Virginia, Charleston Division granted summary judgment against the operator of three defunct surface mines for past violations of the Clean Water Act (“CWA”) and Surface Mining Control and Reclamation Act (“SMCRA”) but granted summary judgment in favor of the operator with regard to claims of ongoing permit violations, finding that the Plaintiffs’ theories constituted a collateral attack on validly-issued permits.  Read More »

Share | Email| Comments|  Topics: Citizens Suit, Clean Water Act, Mining, NPDES, Permits, Successor Liability, West Virginia

On September 14, 2023, in Conservation Law Foundation v. Academy Bus, a Massachusetts District Court held that the members of the Conservation Law Foundation (the “Foundation”) lacked standing to challenge the idling of buses under the Clean Air Act (“CAA”).  Conservation Law Found. v. Acad. Express, LLC., No. 20-10032-WGY, 2023 WL 5984517, at *1 (D. Mass. Sept. 14, 2023). Specifically, the court held that simply breathing in polluted air, without any concrete injury that is fairly traceable to the defendant, is not sufficient to prove an actual injury under the CAA. Read More »

Share | Email| Comments|  Topics: Air, Citizens Suit, Clean Air Act, Emissions, HAPs, Hazardous Air Pollutants, Odors, Standing